CVE-2017-5618

Publication date 20 March 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

GNU screen before 4.5.1 allows local users to modify arbitrary files and consequently gain root privileges by leveraging improper checking of logfile permissions.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
screen	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected
	12.04 LTS precise	Not affected

Notes

seth-arnold

introduced via the following patches: http://git.savannah.gnu.org/cgit/screen.git/commit/?id=c575c40c9bd7653470639da32e06faed0a9b2ec4 http://git.savannah.gnu.org/cgit/screen.git/commit/?h=screen-v4&id=5460f5d28c01a9a58e021eb1dffef2965e629d58

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H